<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style type="text/css">
    .container .cart {
      width: 300px;
      margin: auto;
    }

    .container .title {
      background-color: lightblue;
      height: 40px;
      line-height: 40px;
      text-align: center;
      /*color: #fff;*/
    }

    .container .total {
      background-color: #FFCE46;
      height: 50px;
      line-height: 50px;
      text-align: right;
    }

    .container .total button {
      margin: 0 10px;
      background-color: #DC4C40;
      height: 35px;
      width: 80px;
      border: 0;
    }

    .container .total span {
      color: red;
      font-weight: bold;
    }

    .container .item {
      height: 55px;
      line-height: 55px;
      position: relative;
      border-top: 1px solid #ADD8E6;
    }

    .container .item img {
      width: 45px;
      height: 45px;
      margin: 5px;
    }

    .container .item .name {
      position: absolute;
      width: 90px;
      top: 0;
      left: 55px;
      font-size: 16px;
    }

    .container .item .change {
      width: 100px;
      position: absolute;
      top: 0;
      right: 50px;
    }

    .container .item .change a {
      font-size: 20px;
      width: 30px;
      text-decoration: none;
      background-color: lightgray;
      vertical-align: middle;
    }

    .container .item .change .num {
      width: 40px;
      height: 25px;
    }

    .container .item .del {
      position: absolute;
      top: 0;
      right: 0px;
      width: 40px;
      text-align: center;
      font-size: 40px;
      cursor: pointer;
      color: red;
    }

    .container .item .del:hover {
      background-color: orange;
    }
  </style>
</head>

<body>
  <div id="app">
    <div class="container">
      <my-cart></my-cart>
    </div>
  </div>
  <script src="../vue.js"></script>
  <script>
    var CartTitle = {
      props: ['uname'],
      template: `
        <div class="title">{{uname}}的商品</div>
      `
    }
    var CartList = {
      props: ['lists'],
      template: `
        <div>
          <div class="item" v-for='item in lists' :key = 'item.id'>
            <img :src="item.img"/>
            <div class="name">{{item.name}}</div>
            <div class="change">
              <a @click.prevent='sub(item.id)' href="">－</a>
              <input :value='item.num' type="text" class="num" v-on:keyup.enter='change(item.id, $event)' />
              <a @click.prevent='add(item.id)' href="">＋</a>
            </div>
            <div class="del" @click='$emit("delshop", item.id)'>×</div>
          </div>
        </div>
      `,
      methods: {
        change(id, e) {
          this.$emit('changenum', { id: id, num: e.target.value, type: 'change' })
        },
        sub(id) {
          this.$emit('changenum', { id: id, type: 'sub' })
        },
        add(id) {
          this.$emit('changenum', { id: id, type: 'add' })
        },
      }
    }
    var CartTotal = {
      props: ['list'],
      template: `
        <div class="total">
          <span>总价：{{shop}}&yen;</span>
          <button>结算</button>
        </div>
      `,
      computed: {
        shop: function () {
          let numser = 0
          this.list.forEach(item => {
            numser += item.price * item.num
          });
          return numser
        }
      }
    }
    Vue.component('my-cart', {
      data: function () {
        return {
          name: '张三',
          list: [{
            id: 1,
            name: 'TCL彩电',
            price: 1000,
            num: 1,
            img: 'img/a.jpg'
          }, {
            id: 2,
            name: '机顶盒',
            price: 1000,
            num: 1,
            img: 'img/b.jpg'
          }, {
            id: 3,
            name: '海尔冰箱',
            price: 1000,
            num: 1,
            img: 'img/c.jpg'
          }, {
            id: 4,
            name: '小米手机',
            price: 1000,
            num: 1,
            img: 'img/d.jpg'
          }, {
            id: 5,
            name: 'PPTV电视',
            price: 1000,
            num: 2,
            img: 'img/e.jpg'
          }]
        }
      },
      template: `
      <div class='cart'>
        <cart-title :uname='name'></cart-title>
        <cart-list :lists='list' @delshop='delhandle($event)' v-on:changenum='changes($event)'></cart-list>
        <cart-total :list='list'></cart-total>
      </div>
      `,
      methods: {
        delhandle(id) {
          const index = this.list.findIndex(item => {
            return item.id = id
          })
          this.list.splice(index, 1)
        },
        changes(e) {
          if (e.type === 'change') {
            this.list.some(item => {
              if (item.id === e.id) {
                item.num = e.num
                return true
              }
            })
          } else if (e.type === 'sub') {
            this.list.some(item => {
              if (item.id === e.id) {
                item.num -= 1
                return true
              }
            })
          } else if (e.type === 'add') {
            this.list.some(item => {
              if (item.id === e.id) {
                item.num += 1
                return true
              }
            })
          }
        }
      },
      components: {
        'cart-title': CartTitle,
        'cart-list': CartList,
        'cart-total': CartTotal,
      }
    })

    var vm = new Vue({
      el: '#app',
      data: {},
    })
  </script>
</body>

</html>